Book-cover-making machine



l .Mardi 3, '1931. A, KIRCHHbFER 1,794,521

BooK covER MAKING MACHINE Filed Jan. 16. 1929 sheets-sheet 1 March 3, 1931. A. KlRcHHoFER l BooK COVER MAKING MACHINE Filed Jan. 16, 1929 5 Sheets-Sheet 2 wwf.. l

y @irs JM'Z'orns-y March 3, 1931. A. KIRCHHOFER BOOK COVER MAKING MACHINE 5 Sheets-Sheet 3 Filed Jan. 16, 1929 /m/nor l Hifi/orne! March 3, 1931. A. KIRCHHOFER 1,794,521

l BooK coi/ER MAKING MACHINE y Filed Jan. 15. 1929 5 sheets-sheet 4 March 3, 1931. A. KIRCHHOFER 1,794,521.

BOOK OVER MAKING MACHINE Filed Jan. 1e, 1929 5 Sheets-sheet 5 n Jfrno/c/ Kirchhoff-rl",

///l NMO/Livery. i

*'30 views of the drivine' Patented Mar. 3, v19,31

JesrsfNr orales ARNOLD iirncirnornn, or Henson, NEW YORK Appnaan'mea January 1e, i929. sei-iai No. 332,321.

The present invention relates to book cover makingI machines and has for its object to provide an improved machine of this type. For,a'consideration of what l believe to be novel and my, invention attention directed to the followingspecification and the claims appended thereto. s 2

ln' the drawi1'ig,Fig. lis a perspective view,

n pint-lyV diagrammatic and partly broken 19 away, of theupper portionof. the machine, a part of the machine being raised up to show the parte beneath it; Fig. 2 is a skeleton view of thedrive forthe machine; Fig. 3 is a side view,fpiartly broken away and Vpartly diagrammatic; Figs.y 4 to7 are views showingthe steps used in forming a cover; FigQS is a detail perspective view of the paper feed; Fig, 9 is a transverse sectional View 0f the side folding` andpressing mechanism; F 10 is 23 an end view of the portionof the machine shown in Fig:l 9; Figs.-11, 12 andl-l are detail perspective views of the side fold-ing' mechanism; Fig'. 14 is a detail sectional view of the board feeding' mechanism; Fig. 15 is a detail 25 }j erspective view of the center gage strips and .the adjusting means therefor; 16 is a top plan view and Fig'. 17 is a side view of theiinal pressingmechanism andthe stacking mechanism; Figs. 18 and 19 are detail D clutchmechanism, and Fig.` 2O is a perspective view ofthe end fold'- njigrmeans. y p

it. book cover as constructed by the may chine cmnpri three pieces, a cover sheet 1,

(see 4; lo?) andtwo cover boards 'l` cover sh f be cloth, paper or other The cover boards may ...lows a completed cover, the two cover i 'i0 boards being glued to the cover sheet and the edges of the cover sheet being. turned in over the edges of the cover boards.

The machine will be understood best by lesoribingry the series of steps performed i ln tl e first instance a cover sheet glued on upper side is fed into the machine by an endless conveyor oiycarrier and -at the san/ie time two cardboards are pushed from be with two'stacls of card boards and posi- ;.e la. 1

Lid..

lon holders over theI cover sheet. `;The

e a suitable Vgrade of cardboard.Y

movement of the carrier then ceases and nexta'presser mechanism presses the cover boards down onto the cover sheet to a position between two side folding members. The side folding members are then moved toward each other to'foldthe longitudinal edges of the cover sheet over the cover boards and press themdown tightly (see Fig. The presser mechanism then releases and the cover sheet and cover `boardsare fed forward again betwcen sets of rollers. ln connection with one set of rollers is a folding mechanism which Yturns the two ends of the cover sheet over theend 'edges of the cover boards as shown in Fig. 7. Following this the cover structure 'is given' aV final pressii'igl operation' and is ejected from the machine onto a stacker.

Referring lirst tolfig. @which shows diagrammatically andin skeleton form the generalv driving arrangenjient, l() indicates a driving pulley which turns continuously and is loosely mounted on a main drive shaft 11. Pulleyll() is adapted to be connected to drive shaft 11 by a clutch structure 12 shown in detail in Figsl and 19. Clutch structure 12 Y is held open normally by a, tripy finger 13 carried by a shaft 14. On shaft 141 is a .lever arm 15 connected by a-linlr 16 to a feed table 17. A'springlS holds trip linger 13 in its normal position wherein it holds the clutch open. rlhe feed table is pivoted on the frame ofthe machine andwhen it is depressed to feed a glued cover sheet into the machine, the trip linger is released and the clutch connects the driving pulley to the driving shaft. y

The driving shaft then makes one complete revolution after winch the clutch is antomatically thrown out and the shaft stopped,

the table hearing in the .meantime beenremounted to turn on shaft 22.

through the rollers and a fourth cover is being ejected.

The feeder and roller mechanisms are operated by a crank 19 on shaft 11 which is connected by a link 2() to a disk 21 fixed on a shaft 22. On disk 21 are pawls 23 which engage a ratchet wheel 24. Ratchet wheel 24 is fixed to a gear wheel 25 and both are loosely Gear wheel 25 through gearing 26 drives a shaft 27 which forms the rear feed mechanism shaft. Spaced forwardly from shaft 27 is a front feed mechanism shaft 28. (Dn shafts 27 and are two pairs of sprockets 29'and 30 on which run endlessl chains 31. '0n chains 31 are spaced pins 32 for engagement with a cover sheet. Sprockets 29 are carried on splines 33 on shaft- 27 so that while they turn with the shaft they may be adj usted along the shaft. The sprockets are held positioned by side bars 3l having fingers at their ends which engage the opposite side faces of the sprockets. The side bars are connected at their central portions by a cross-rod 36 having yleft and right hand threads and a knurled handle 37 at its one end. By turning the rod, the sprockets may be adjusted toward and away from each other by reason of the right and left hand :threads7 `thus adjusting the distance apart of theendless chains.

On shaft 27-is a pair of middle roller-s 38 which serve to assist in feeding-the book cover to a pair of squeezing rollers 3S) from whence the book cover is fed successively' through pairs of squeezing rolls YlO'and 4l. The shafts of these rolls are geared together at their ends by gears 42 and all are driven by a chain 113 driven by a lgear ta on shaft2?.

'Vitn the described arrangement it will be seen that when connecting rod 20 `moves toward the left as shown in FiO. 2, the pawl and ratchet mechanism will turn the gearing and feed .mechanism but that when it moves toward .the right the .pawls will travel back around the ratchet wheeL-the gearing and feed mechanism then being stationary. Thus on one half of each revolution of shaft 11 the gearing and feed mechanism is actuated while on the other half it is stationary. Shaft 22 has an oscillating movement, being turned first in one directionand then in the other as shaft 1'1 rotates. Fixed on shaft '.22 is a wheel Lt5 connected by a V.belt 46 to a wheel 47 Vfixed on a shaft 418. On shaft 48 'are gears 49 which engage racks 50 (see Figs. 1 and let) of the cover board feed mechanism. .Because of the oscillating movement-'of shaft 22, gears 49 are turned first in one direction and then in the other thus feeding racks forward during one half revolution of shaft 11 and back again during the other 'half revolution of shaft 11. v

@n shaft 11"are:two segmental gears v51 adapted lto engage-*with "gears 52 on a 'shaft 53. Carried by shaft 53 are crank wheels 5t to which are connected the lower ends of connecting rods 55. VThe'upper ends of connecting rods 55 are connected to the vertically movable portion of the folding and pressing` mechanism, (see Figs. 1 and 3). During the back movement of connecting rod 20, gear segments lengage gear wheels' plate56 carried by toggle levers '57 (Fig.

17) and an upper presser plate 58 supported on posts 59 which project upwardly from the frame of the machine, the plate being fastened yieldingly on the posts by springs 60. Posts 59form guides 'for movable plate 56. Toggle levers 57 are connected by a rod 61 to an eccentric 62 on shaft 11. The arrangement is such that plate 56 is raised-to perform its pressing 'function at the same time that `the connecting' .rods are moved to perform the pressing and 'folding operaion before described. v

4Beyond the final pressing inechanismlis an ejector comprising two arms 63 which slide in guides 64 and have pivoted ejector pins 65 at their ends (Figs. 16 and 17), the pins being capable of turning` toward the right (Fig. 17) but being held by stops fromturning toward the left. .Arms 63 are connected together 'by a rod 66 at the center of which is a link 6.7. Link 67 is connected'by a cross rod 68 to the =upper endof a lever 69 pivoted at its lower end on an ear 7() on the frame. Lever69 is connected by a rod 71 to a Aam 4f2 on shaft '11, the rod being provided with Aa roller'7 3 which runs in a groove iii-the cam.

The arrangement is such that when plate 56 has moved away from plate 5S ar1ns63 are moved forward to bring pins into eniaeement with :ibook cover and then movedibaek to pull it off the plate, dropping it onto a holder (el. ltis desirable .to stack the conipleted covers aiways with the outs-idee in engagement with `each other and the glued or 'insides in engagement with each other so asto'avoid getting glue on the outsides of the completed covers. To accomplish this. l provide means for turning over every other cover. This means comprises an arm 7 (Fig. 17) pivote'd at its lower end on an ear 7 6 on the frame and providedwith a sloping ledge 77 at its upper end. On lever 'Tais a V n F u `Y l Y pin 18 which engages the edge of a -cain 79 on a shaftBOQbeing held inengagement .with

*the ycani 'by a spring 80.*. 0n shaft 80 is a w other,l .sliding Y in guides 87.

` ofthe wheels to `each other being suchthat two revolutions of shaft 11v is required te effect one revolution of shaft 80. lifhenarin 7 5 stands in theposition shown in Fig. 17, a cover platebeing pulled off plate 56 will strike the top kofledge 77 and will be turned to fall' with the glued side down. lvhen the next'coveris ejected, arm 75 will have been moved bach by cam 79 so such cover will fall with the glued side up.

From the foregoing description, it will be seen that all the mechanisms Yare driven from saft 11 lthat duringvthe first half revolution of shaft-11 the feeding and ejecting mechanisms are operated, and that during the second half revolution the two pressing mechanisms are operated. V

In connection with Fig. 2. and also in connection with'otherfof the views, the details as to bearings for the shafts have been omitted to make thexdrawing clearer. It will be understood that suitable bearings are provi( ed in thefraine of the machine for the various shafts and other moving parts. f

Forming a part of the frame of the machine and extending across it between the loops of chain 31 is a top plate 84 provided with stationary posts on which slide the presserV plat`e`8'6'to 'which rods 55 are connected. Plate- 86 is shown diagrammatically in 1 and also the parts carried by it.V 'Also,lit is shown vraised up above its true position so as to'show the partsbelow. 'lt is shown in its correct relative position in Figs. 8', 9 and 10'. On plate 84ere vend guides 87 in which slide transversely extending bars 88 having inturned ends 89 provided with openings 90,

ars 88 are held yieldinglyagainststops91by springs 92 which surrr'iund'pins 93 connected to the bars, rand lying between the heads of the pins andthe lstops. `Bars V88Afare thus mounted so they may move toward each Supported --on bars 88 vare .L-'shaped folder hars 94 having pins 95 on their undersides*which slide in holes in bars 88. `Bars 94 are yieldingly supported by springs'97, and lie substantially flushwith a' plate 98 carried by two longitudinally extending strips V99 supported by posts 100and held yieldingly by springs 101. It willbe seen' that plate 98 and strips 99 maybe -forced downward until posts 100 strike base plate 84 and that bars 94 maybe forced downward until theystrilre bars 88.

- Carried by the undersidevof presser plate 86. is a frame 102 `(shown diagrammatically-in Fig. 1)l hung on studs108 and held by springsf104 so it may' have 'a yielding upward movement.y Carried by frame 102 are 'two pairs of spaced holder bars 105 and 1.06, the supporting arms' 107 Vforthe bar s'being adjustable along the lframe fordifferent widths-of cover boards. Midway between each pair of holder bars is a spring pressed ejector pin 108 and adjacent to each is a 'presser bar 109.'l The `relative positions of these' parts is best shown in Fig. y9. `Holder bars and 106 are of a length'somewhat less than the distance between bars 94 so they .mayk enter between them while' presserabars 109arelong enough tov strike on top of ybars .94. Depending from each end of presser plate 86 `are twoarms 110having beveled ends 111.y The beveled ends are adapted to enter openings 90to force the lfolding bars 94 toward eachother'when plate y86 ismoved downward. s

Extending longitudinally ofthe frame of i two gauge frames 112 and the machine are 118 which are adyustable sideways for different sizes of covers. At theirfront ends they are provided with downwardly extend A ing plates 114 to which are fastened spring plates 115 having inturned ends 116 (see Figs. 9 and 11). Midway between gauge frames 112 and 18 and extending parallel to them are two inside gauge strips 117 provided with spring plates 118 having inturned ends1119. Spring plates,v 115 and 118 are arranged in opposed relation to each other as best shown'in Fig. 9 and their intnrned ends form hooks or flanges which i serve as the initial supports for the cover boards. Gauge strips' 117 are threaded on two spaced rods 120 `(see Fig. 15) and are pressed aga-insta cone shaped spreader 121 by springs V122. Y By adjusting the/head of cone shaped spreader up and down by means of the screw-.123 strips 117 may beset the desired distance apart. The opposite ends of strips v117ja're held parallel by a spreader 123 pivoted 'at its center and located `beje;

tween the strips. A spring 124 fastened to an arm 125 on the pivot pin for yspreader 128a servesto turnth'e spreader, -the spring-being strong enoughzto move the ends of the strip and holdthem parallel against the stacks of cover boards. This is best shown in Fig; 1 where A indicates one stack of cover boards, the other being omitted from the drawing; y

' To the rear of top'plate 84`is' a top plate:

`(sce Figs. 1 andl4) provided with channels xix:

llas* ned to 127 in which racks 50 slide. 'plate126 are '.,cross pieces 128 and ftical pins 129 which 'forni positioningmeansfor the two stacks of cover boards, the pins being carried by the cross pieces. The forward pins terminate just short of plate 126 so that Y a. vcover board may slip beneath them' and the ends are provided with holes in which are Karranged 'spring pressed balls 130. This arrangement serves to permitbut one board to ff" befed forward at a time., rlfhe two stacks of cover boards rest `on plate 126, one stack bee `.ing above eaclrchannel127. Ehe forward end l` l i or each rack (Fig-14) is bifurcated and the fin'cations have' slo'ts`131 in which is a pivot pin which carries a finger 132 having an upwardly projecting flange -133adapted to engage theedge offacoverboard. On'the rack is a `cam surface 'Which slides under finger surfacefslides Iunder llinger 132 raising it so that 4flange 133 `Willfcatch -a-cover board as Y shown 'in Fig-.14. lvhen the. rack starts back,

4the cam surface moves from Aunder the 'finger permitting it -to `drop v-dovvn and slide back under the stack. F inger 132 isf-arranged to offer sufficient resistance against movement that itmustbefpnshed'andpull'edby'the rack which meansthat the lpivotipin for finger 132 is engaged by one end or the other'of slot 131 depending on thefdirection of movement.

At the rearendsof bars 1'1-2 and '113 and adjacent-tothe endsof rolls 40 Vare end folding fixtures .134 'which serve to fold'over the endedges ofthe coverv sheet as itzpasses from rollers 39finto-rollers 40. The structure'of'the I*folder andits=modeof=operation is-clear lfrom aninspectioinof Fig. 20.

Carriedby table 17 -are rollers 135, one at each of its :free cor-ners, which are located over chains 31. The cover sheet is fed under these rollers and by Vthem is pressed down o'nto'the chainycausing pins 32 4to penetrate the material'cf thecover. Rollers 135 may be adjust-ed 'in slots 136 to locate them in accordance with the adjustment'of the'chains. The ycorners of the table are cut outas is shown at 137 'to accommodate the rollers.

In making a cover, it is important to lturn asmooth'even corner so to obtain a neat ap- :pearing ffold. To 4accomplish this result, 1 provide at the ends of the folder bars 94 spring tuckers 138 which serve to press the 'cover-sheet downo-ver the edges of the cover boards. This'is shown -in detail in Fig. 13.

The details of 'the clutch mechanism are `shovvn in Figs. 18 and 19. Pulley Wheel 10 is 'carried byfasleelve 139 whichis l'loose on'shaft 11. On sleeve 139 Ais a collar y14() ha-ving a flange 141 in which Eare `a series lof spaced notches1142, four being shown inthe :present instance. Fixed on shaft 11 `is a ring 143 ivliichlies against'collar `14()insideflange 141. 'Itavill be seen 4that when `flange 141 is connected to vring 143, the pulley :Wheel Will be connectedto the shaft 11. For-this purpose lprovide a iley 144located `ina notch in ring 143 and Aadapted to drop into one ofthe notches 142 in fia-nge 1.41. The hey 144 is held by a screw 1545, the head 4of nih-ich is located 'in a recess in the key. A spring 146 -actsto force key 1-44foutward, the distance it can 'move being :limited bythe yhead of the screw. vFastened to the frame of the machine isa guide 14:7:on which slides ay cam plate '1148.having la cam surface 149'adapted'to engage key l1.4.4. In the corner of plate 148 is a not-ch with which trip finger 13 engages, the Vfingerbeing pulled downward by a spring `1150. Plate `148 i'spushed 'toward the right (Fig. 18) by aspring 151 and is ad'aptedto be moved toward the left by a lever arm 152 Which engages a pin 153 projecting from the plate. Lever arm 152 is carried on one end of a shaft 154 pivoted in the frame piece 155 of the machine. On theother end of shaft 154 isa lever arm 156 adapted to be engagedby a cam 157 on shaft 11. Uien the .parts are in the positions shown in Fig. 18, cam surface 149 holds key 144 flush with the periphery of ring 143 so that pulley Wheel 10 turns freely Without connection with the shaft. If now table 17 is deln'essedfto feed a cover sheet into AVthe machine, ltrip finger 13 is lifted releasing plate 148 which is then moved toward the right, F 18, by spring 151. This moves cam surface 149 from-beneath key'144 Whereupon the key 'f'alls'into a notch 142 thus connecting the pulley Wheelto shaft 11. Shaft 11 non7 begins toturn. As soon as cam 157 reaches Vlever yarm 156, the arm nis depressed andturns'lever arm 152 so-as to return plate 148 to itsleft hand positionvvhere itis caught by trip linger 13, table 17in the meantime having been released. Now as the'shaft continues to turn, -key 144 Will be brought into engagement `With-cam surface 149 which 'will fmove the 'key upward out ofthe notch 142 and-so open theclutclr It will thus 4beseen that when table 117 'is-depressed to feed a cover sheet vinto the machine, shaft 111jmakes one complete revolution after Which-it is `stopped automatically. Y

The operation Ais as follows. The operator .places ya cover sheet .which -has been previously glued on table 17 with the glued sid-e up and vvith'the forward edge under rollers 135,

the coversheet being lengthwise of the table.

chine. During the first half revolution ofthe driving shaft l11 the chains 31 are'turned carrying the cover sheet -intothe machine and to a position over plate 98. YAt th-e same time the tvvo racks 50 are fed forward pushing a cover board from 'beneath each fpile ontothe cover board supports formed yby the. inturned flanges 1.16 and 119. The operation of the Yboard feed is clear from-an inspection of Fig. 14. In Fig. 9 cover boards 2 are shown positioned on the flanges 116 and 119. The movement of chains`31 now ceases and during the second halfre'volution of shaft 171 and ,iv'hi'l'e the racks 50 arefbeing returned, gear "segn1e11t`s'51 turn `shaft '53 one complete y"revolunon, lowering and then raising the ipresser plateSGand tlie'parts o'airied'by'fi't. AS the 'presser *plate moves vdownward, 'ejector 4pins 1108 engage Withthe central .fportionsfof Ythe cover boards, :pushing them downward off flanges l116 and 1119 and onto thecover sheet. Holder-'bars `105 land 1106,then engage with thecover `boards to'hold .them in positio'n =on the :cover sheet and 'to depressl the lplate'f98, brin ging-it downuntil the 'top faces ofthe cover boards are below the folder bars 94. This is shown in Fig. 11 Where it will be.VV seen that the plate 98 has been' depressed.;

The depressing of thel plate serves also to turn upthe two side edges ofthe cover sheet as` shown in Fig. 1l, the cover sheet koverlyingv the bars 9st by an amount to give the desired degree of turningof the cov-er sheet edges.

The beveled ends 111 of arms 11() now enter.

openings 90, pulling bars 88 toward each other and thereby moving iolder bars 94k over the edges of the cover boards. This is shown Y in Fig. 12 where it will be' seen that the folderbars-have moved from the lposition shown in Fig. l1 inward, at the'same timer turning the edge ofthe cover sheet down onto the 'edge-s of the cover boards.l The presser bars 109 now engage with the tops of the bars 94, pushing the bars downward and squeezing tightly the turned in edges of the cover sheet. At the saine time the tuckeis 138 tucltthe edges ofthe turned in portions down smoothly overthe endsvof the cover` boards asis shown in Fig. 16. Thepi'esser plate 86 is then returned tol its upper position. This completesone revolution of the shaft `11y and the machine stops 'asalready described.

The operator lthen feeds another sheet intol`r themachine again kde iressino table 17 'and 3 b l l h f causing shaft 11to malte another revolution;v

On this revolution the first fed in cover sheet and the cover boards thereon are carriedinto rolls 39. The feed of. chains 31 then. stops anda rpressing operation takes place butat this time no operation is performed of the first cover structure. The rolls 38 form guide and supporting rolls for directing the cover struc-- ture into rollsy39. New. on the next rotation of-.shaft.11 the ,cover board structure is-fed through squeeing rollers e0..V During this movement the end edges of the cover sheet are turned in by theV folding fiiXturesy 135i, the

folding taking place ustbeforetliestructure enters the rolls 40. Thus the end'edgesgare,y

lui-ned in and pressed into place. V'The cover structure is carried forward 'through 'thel rolls 41 and onto the lower presser plate As shown, lower rolls 40 and el are connected by a wide belt for carrying the cover structure.

rlfhe pressure plate 56is operated each sec- 0nd half revolution of shaft 11'. 0n its'neXt operation after the cover structure isl carried onto it, the cover structure is given its linal pressing, the presseroplate 56 being raised rby toggle levers 57 as already explained. Pressez' plate 56 may be a suitable embossing plate7 being provided with a suitable pattern as shown in Fig. 16 for impressing `on the coverl board structure. `Also it may be suitably heated by electricity orv gas.

' On the next operation of shaft 1l, the coni-v pletedoover board will beejected from oli plate 56 by the ejector arms 63. As the arms move in between the plates, fingers will turn on their pivots, sliding overthe cover board.v

AttheA end of the inward movement the fingers will drop down over the edge of the cover board and on Vthe return movement of the arms vthe,cover board structure will be pulled out from `between the plates and dropped onto the rholder 741;, v.every other structure` being turned over as already explained sothat the glued sides are in Contact with each other.

connection with the .cover sheet feed, it will be` noted that the sheet is positively fed into `the machine by the chain and that the pins on theehain engage the ends'of the sheet throughout its width. j This is of advantage because it insures that thev cover sheet is fed 129a oarriedby them serve to hold'the cover. Vboard stack straight. Also the right hand cross piece; 128, Fig. 1, is adjusted the kdesired distance from the lefthand cross', piece128f which is stationary,y This serves to hold the stacksY rinly in `correct j alignment. `The use of the round pins 129 and 12921 for positioning thestacks has the advantage that theyoffer little friction to movement of the boards and so assist inthe reliable operation of the ma-y chine. f i e e When side bars 112fand 113 are adjusted, the foldinglixtures 1341- which are carried by the bars are adjustedsimultaneously there-v l with. 'Iregardthis arrangement asbeing one.

important feature of my construction as it insures thatv the foldingfixtures arer alwayscorrectlly aligned with the cover boards.

Also, it makes the adjustment, of the struc ture a simplel and easyy matter.

Also, sprockets 2 9 and 30 are adj ustCl, C2ol lars 33 being loosened to permit sprockets 3l), which turn on shaft 28,- to move sidewise.

In connection vwith the pressing and side folding mechanism, it will be seen that first the cover boards are correctly positioned on their initial supporting means over ythe covern sheet and' that theejector pins 108v i'irst press the cover boards Ydownonto the cover sheet and hold ,them central after which they are firmly pressed and heldl by the holding bars and.106. -vThis insures that the cover boards are initially square on the cover sheet.

Now when the plate-98 'is pressed 4downward to the positionshown in Fig. 11, the edges of the cover sheet' are lirst evenly turned Aup along` their` entire length and Y then evenlv turned 'oi-'eras isfshown in Fig... 12. This re- EGG ' and means forinovingthe coversheet` and sults in asinooth evenlfold. Afteit-his fold'i is made, the same-is then pressed in by the presser bars 109. Bythis ser-ies of 'operati-ons improved results are obtained.

The machine is vcomparatively siniplein structure and easy to operate, being semi-V autoniatic. It can be built at 10W cost so that itmay be used by the small'bookbinder who could not afford an entirely automatic niarchine. Y

luV accordance with the provisions of the patent statutes,A l have described the princi ple of operation ofmy invention, together with the structure which I' iioiv consider to represent the best embodiment-thereof, but l desire itto be understood` that the apparatus shown onlyy illustrative and that the invention may be arriedgoutbyothelr means. Y `What l claim as ne\van d desire to secure by Letters Patent ofthe United Stat-es, is:

l. In a bookV cover vmaking machine, the

combination an endless carrier for convey` ing a coverlsheetinto the machine, saidcarrier having means-for holding the cover sheet along 'opposed1 edges, means for' positioning covei-Jboards above saidlc'over sheet, meansforpressing said cover boards down Onto the sheet and holdingthempositioned and for effecting folding in of the free edges While said first-y named edges are still held by said holding ineans,'and folding mea-ns forsaid' first named'edges'and squeeZingr-olls to Which the cover structure is 'fed by said carrier after the folding of said freeedges is effected. 2. In a book ycover making machine, the;

combination of an endlesscarrier, means for.

imparting stepby-step movements to said carrier, pressing andA folding mechanism, and` meansfor actuating said pressingmechanism between step-by-step movementsof the carrier, said pressing and folding mechanism comprising VL-shap'ed bars between-.Which the cover sheet and boards are fir-st moved to, turn up edges ofvsaid cover sheet,l means for moving said L-shaped-bars overy edges ofthe cover board, andY means for pressing saidbars down on the cover. boards.

3; In a book covermak-iiig machine, the

combination ofan endless carrier, pressing and folding mechanisnito which the carrier delivers a cover sheet, and means for actuating said pressing-and folding mechanism, said mechanism comprising L-shaped bars between Whichuthe cover sheet and board-s are first moved toturn upk edges of said cover sheet, means for moving said L-shaped bars over edges of the co-ver boards, means f( pressing said bars downen the coverboards,

boards away 'from the pressing` mechanism, said L-shaped bars having-tucking means for pressing the cover sheetdoWn atedlges ofithe" cover boards.

l. In ,a bookcover iiiakin-g machine,jthe

combination of a yieldingly supported presser plate, L-shaped folding and pressing bars positionedalong two edges of said plate, cover board supporting means locatedabove saidplate, means for 'positioning a cover sheet on said plate and cover boards on saidl sup porting means, and movable means for i'i'rst forcing said cover boards oifsaid supporting means onto said cover sheet, then depressing said'presser plate to-turn up edges of the cover sheet, and then moving` said bars to turn edges of said cover sheet over onto the cover boards.

5,. In a Ybook cover making machine, a

movable table, means for feeding a cover sheet from the table into the machine, pressing and folding mechanism, a shaft for driving firstl the feeding means and then the pressing and folding mechanism, a clutch controllingthe application of power to said shaft, means connected to the table for closing the clutch, and means for opening the clutch automatically after one operation of the feeding means andthe pressingand folding mechanism.

6. In a book coverv making machine, initiall pressing and folding mechanism, 'squeezing rolls and final pressing mechanism, anendless carrier for conveying a cover sheet in tvvo steps first to the pressing and folding mechaniemand then to the squeezing rolls, and ii'ieans for operating simultaneously both said mechanisms between saidtwo steps.

7. In a book cover making machine, initialI pressing and folding mechanism, squeezing relis aiid'final pressing mechanism, an endL lessk carrier for conveying, a cover sheet in tivo steps first to the pressing and folding iechanism and then to,the squeezing rolls, means for operating both said mechanisms between said tWosteps, and'means Vfor stopping the machine automatically after each operation' of said, carrier Aand said niechanisnis 8. VIn a bookcoverunaking machine,k thez combinationof means for forming covers includingfaiinal pressing mechanism, a holder, means,for,ejectingpcovers from said pressing mechanism onto the holder, andmeans for turning over every other cover.

9. In a book cover making machine, the

supporting means, `means for adjusting saidl side barsrelatively to each other landineans carried by said side bars for turning over edges of the cover sheet onto the cover boards,

whereby said supporting means and edge turning means are simultaneously adjusted and maintained in alignment.

1l. In a book cover making machine, a feed table, supporting means for two stacks of cover boards, a folding and pressing mechanism located between the table and the supporting means, pressing rolls located beyond said mechanism, an endless carrier for moving a cover sheet from the table to the folding and pressing mechanism andthence to the pressing rolls, means for moving cover boards from the stacks to the folding and pressing mechanism, a final pressing-mechanism to which a cover structure is fed from the pressing rolls, means for imparting stepby-step movements to the endless carrier, and means for operating said two .mechanisms between step-by-step movements of the carrier.

12. In a book cover making machine, the combination of a presser plate, folding and pressing bars positioned along edges ofsaid presser plate, means for positioning' a cover sheet on said presser plate, cover board supporting hooks located above said presser plate, means for supporting cover boards adjacent to said presser plate, reciprocating means for transferring cover boards from said supporting means onto said supporting hooks, and downwardly movable means which first engage-s cover boards to force 'r them oif the hooks onto a cover sheet, then effects movements of said folding and pressing bars to fold ever edges of the cover sheet, and then presses the bars downwardly to force the turned in edges of the cover sheet tightly onto the cover board.

13. In a book cover making machine, the combination of a presser plate, folding and pressing bars positioned along edges of said presser plate, cover board supporting means located above said presser plate, means for supporting' cover boards adjacent to said presser plate, means for simultaneously positioning a cover sheet on said presser plate and cover boards on said cover board supfporting means above the presser plate, and

downwardly movable means which first engages the cover boards to force them off said supporting` means onto the cover sheet, thenV effects movements of said folding and pressingfbars to fold over edges of thencover sheet,

and then presses the bars downwardly to force the turned in edges' of the cover sheet tightly onto the cover boards.

14. In a book cover making machine, the combination of a presser plate, folding and' pressing bars positioned along edges of said presser plate, cover board supporting means located above said presser plate, means for supporting stacks of cover boards adjacent to` and above the plane. of said supporting means, reciprocating means for transferring coverboards from the bottoms of said stacks to said supporting means, means for positioning acover sheet on said presser plate, and downwardly movable means which first engages the cover boards to force them/'from said supporting'means onto the cover sheet, then effects movements of said folding and pressing bars to fold over edges of the cover sheet, and vthen presses the bars downwardly to force the turned in edges of the'cover .sheet tightly onto the cover boards.

, 15; In a book cover making machine, a feed table, alirst folding and pressing mechanism,

16., In a book cover making machine, a'

feed table, an endless carrier for conveying cover sheets from the feed table into the machine, said carrier having means for holding the cover sheets along opposed edges, folding and pressing mechainsm for the longitudinal edges of the cover sheet, folding and pressing mechanism for the transverse edges of the cover sheet located beyond said first mechanism, means for imparting successive movements to said endless carrier for conveying cover sheets from the feed table to said first mechanism and'tlien to the second mechanism, and means for positioning cover boards onsaid cover sheets atsaid first named folding and pressing mechanism.

17. Ina book covermaking machine, a feed table, an endless carrier for conveying cover sheets from the feed table into the ma.-

chine, said carrier having meansfor holding Y `of said endless carrier, means for operating said'first named folding and pressing mechanism, and means for moving the cover boards off said supporting means onto the cover sheet prior to the operation of the first named folding and pressing mechanism.,

18. In a book Cover making machine, a :feed table, an .endless carrier comprising spaced hands having projecting pins for engaging opposed edges of ,a coverk sheet, fold- )..ieing' and pressing mechainsm for the free edgesfof .the @over sheet, means foropemting said mechainsm While the cover sheet is held on said pins, vand folding and pressing mechanism Afor the opposed edges `of the cover j sheet A)no .which it is conveyed by -rthe endless carrier after the operation of said first named Jfolding and pressing mechanism.

:In Witness whereof, I have hereunto set my hand.

am ARNOLD KIRCHHOFER, 

